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BASIC FUNCTIONS OF A TORQUE CONVERTER: |
The torque converter takes the place of a conventional
clutch and pressure plate used with stick shift transmissions. It is nothing more
than a centrifugal pump (impeller) which could be compared to a fan, which drives
another fan (turbine) that is connected to the rear wheels. The force that turns
the turbine is referred to as torque. This results from the impeller expelling a
column of fluid rotating counter clockwise (viewed from the rear of the vehicle)
as it enters the turbine runner. It is very similar to a fire hose aimed at a wall
that creates a rearward force on the hose. This rearward force from the column of
oil rotating from one fan to the other and finding the exact strike point is what
creates torque and turns the turbine. Finding the strike point of the rotating oil
is achieved by changing the angle of the fins of the impeller. As torque increases,
the vehicle begins to accelerate at a higher rate. One of the ways that stall can
be raised or lowered, is by changing the angle of the direction of flow entering
the turbine runner. Another is by changing the diameter of the converter itself. |
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